[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Collosphaeridae Müller, 1858 Genus Acrosphaera Haeckel, 1881 Acrosphaera spinosa (Haeckel, 1862) 1 †Acrosphaera spinosa echinoides (Haeckel, 1862)